Efficient RCS measurement technique by near-field far-field transformation which utilize 2-D plane-wave expansion

A near-field far-field (NF-FF) transformation technique for RCS measurement is proposed. This technique employing two dimensional plane-wave expansion enables us to measure RCS from two dimensional near-field measurement. It cause significant reduction of near-field measurement cost for relatively thin measurement targets. In comparison with other 2-D transformation techniques, this technique promised more accurate transformation by its capability of transmitting and receiving antennas correction or Fast Multipole Method (FMM)-like source decomposition.